Filter



(No Model.)

J. A. BOWDBN.

FILTER.

Patented July '7, 1`891.

WfTWESsES 57 15 Cf INVENTO@ we Noms refus. cm. vumuvuma. wAsmNmcn, nA c.

' UNITED STATES PATENT OFFICE.

JUNIUS A. BOW'DEN, OF DETROIT, MICHIGAN.

FILTER'.y

SPECIFICATION forming part of Letters Patent No. 455,526, dated July 7, 1891.

Application filed May 28| 1890. Serial No- 353,408. (No model.)

To all whom, it may concern:

Be it known that I, .IUNIUS A. BOWDEN, a

i citizen of the United States, residing at Dethe accompanying drawings, which form a part of this specification. t

In the art of filtration by means of granular filter beds various devices have been employed, whereby the current of water which is utilized to cleanse the bed may be forced with Ia strong pressure into the bed, so that it will thoroughly loosen the granular particles composing the bed, and thus allow the impurities which have gathered therein to be carried off with the current of water.

My invention is designed to produce an apparatus improved, by which this cleansing Aprocess may be effectually carried out; and

it consists in the construction, combination, and relative arrangement of parts hereinafter described.

In the drawings, Figure 1 is a horizontal section of Ithe apparatus embodying my invention. Fig. 2 is'a section at right angles to Fig 1.

In carrying out my invention I have shown in Fig. l what may be termed a horizontal iilter-that is, a filter in which the hori,

zontal dimension is greater than the vertical. In this ligure, A represents the case, .and B a suitable perforated pipe within the same. This perforated pipe I have in this case located Within the center' of the bed; but it is obvious that it canbe located in any part of the bed desired. Within this perforated pipe is another pipe C, mounted in suitable bearings, whereby it may revolve at will. Through this pipe C the cleansing-stream is admitted, and by the opening or openings c from the pipe into the bed the full current of the stream will rush through the perforated pipe and into that portion of the'bed adjacent to the opening.. Thus the full force of the stream acts upon a small portion of the bed only and thorough-ly loosens the granular particlescomposing the bed and .allows the impurities to be carried off. When one portion of the bed has been cleaned, the pipe is revolved slightly or kept continually revolving during the cleaning process, so that the stream is directed into another part of the bed, and so on until the entire bed has been cleansed. The rotating pipe C constitutes a movable. diverter for diverting or directing the inllowing water to different portions of the filtering-bed.

As will be seen, I have illustrated only one form of apparatus in which my invention is embodied; but other forms will readilysuggest themselvss to one skilled in the art Without departing from the spirit of my invention, which consists, essentially, in the arrangement within a filter-case of a stationary perforated pipe having inclosed therein a rotatable pipe that is provided with openings through which by rotating said inner pipe a stream of Water can be directed into and throughV any part of the filter-bed for the purposerof cleansing and renovating such bed.

I am aware that it is not new to provide a stationary pipe inthe body of the filtering material with branches leading therefrom to perforated strainers located at different points in the filter-bed, and such stationary pipe has been provided with an interior closely-fitting ing with these branches, so that by rotating the inner pipe wash-water may be discharged therefrom into these branches successively as each branch is brought opposite its corresponding opening in the rotatable pipe. In this way wash-Water is directed successively into one or the other of these perforated strainers and caused to wash the portion of the filter-bed adjacent to any such particular strainer. Such a construction is shown in the patent to Hyatt, No. 402,738, of May 7, 1889; but I do not claim such a construction. My own construction differs therefrom in the fact that in my device my rotatable pipe is located rotatable pipe having openings correspondimmediately within my strainer, so that as Y IOC out its entire circumference it is manifest that as the interior pipe is rotated the wash ing-stream will issue successively in all radial directions, thus operating not only to cleanse successively all parts of the strainer but to wash eftectually that immediate portion of the filter-bed which may rest against that portion of the strainer opposite the issuing Water. It is manifest thatby my device each part ot the strainer throughout its whole circumference will be successively cleansed, While by the Hyatt construction above described the Whole surface throughout of any particular strainer is acted upon sim ultaneously by the Wash-water, which cannot be concentrated, as in my device, upon each part of the strainer successively until all has been cleansed. My construction gives me the advantage of a concentrated stream upon each part of a strainer in contradistinction to a stream the strength oi which is greatly weakened by the fact that it is obliged to act 'simultaneously upon all parts of the strainer.

What I claim is- 1. In a iilter, a strainer located within and immediately surrounded by the filtering material, said strainer having upon its interior a rotatable water-pipe having an opening orseries of openings, as explained, through which wash-water may be discharged, and means extending to the exterior of the filter for rotating said interior pipe, said interior pipe adapted as the same is rotated to concentrate and discharge its Wash-water directly through the opposite portion ot the immediately surrounding strainer into the adjacent filter-bed, whereby in thecourse of revolution all parts ot this .incasing strainer will be successively cleansed, substantially as described.

2. In a iilter, the combination, with the case A andthe perforated pipe B, located in said case, of the rotatable pipe C, inclosed in the pipe B and provided with the elongated opening or openings c, whereby by the rotation of the inner pipe a cleansing stream of water may be directed through said pipe into any portion of the filter-bed, substantially as described.

In testimony whereof I sign this specification in the presence of two Witnesses.

- JUNIUS A. BOWDEN.

Witnesses: v

MARION A. REEVE, W. Il. CHAMBERLIN. 

